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Family Diadematidae

HAWAII

Astropyga radiata

Blue-spotted Urchin, Maui, 20 feet, Photo by Kerry

Kihei, Maui

 

 Blue-spotted Urchin, Maui, 20 feet, Photo by Kerry

Juvenile, Auau Crater, Hawaii, 180 feet

BLUE-SPOTTED URCHIN

Rare on sand or rubble at scuba depths.  Flexible test with neon blue dots and venomous spines.  Attains overall diameter of 8 inches.  Hawaii & the Indo-Pacific.